var s_prim = "foo";
var s_obj = new String(s_prim);

console.log(typeof s_prim); // Logs "string"
console.log(typeof s_obj); // Logs "object"
console.log(typeof s_obj.valueOf()); // Logs "string"

const arr = ["M", "y", " ", "i", "s", " ", "A"];
console.log(arr.join(""));
